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Diamond - Fancy Color (1) Emerald (1) Sapphire (1)

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Chart: Inclusions in Natural, Synthetic, and Treated Sapphire

Nathan D. Renfro, John I. Koivula, Jonathan Muyal, Shane F. McClure, Kevin Schumacher, and James E. Shigley, August 7, 2017

Provides a visual guide to the internal features of natural, synthetic, and treated sapphires.

Chart: Inclusions in Natural, Synthetic, and Treated Emerald

Nathan D. Renfro, John I. Koivula, Jonathan Muyal, Shane F. McClure, Kevin Schumacher, and James E. Shigley, January 27, 2017

Provides a visual guide to the internal features of natural, synthetic, and treated emeralds.

Fancy-color diamonds from Lomonosov, Russia.

Geology and Development of the Lomonosov Deposit, Northwestern Russia

Karen V. Smit and Russell Shor, August 7, 2017

Reviews diamond discoveries at the Lomonosov deposit, as well as the geology of the Arkhangelsk kimberlite province.

Husband and wife gaze happily at emerald rough found in a Colombian mine.

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Colombian Emerald Industry: Winds of Change

GIA, September 8, 2017

Andy Lucas, GIA’s education manager of field gemology, researches and documents the mine to market journey of gemstones. Lucas shares the changes he observed in Colombia’s major emerald mining and cutting areas in a presentation he made at the 2017 JCK Las Vegas show.

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